'Accompanying' in the Bible

And I heard a voice from heaven, like the sound of great waters and like the rumbling of mighty thunder; and the voice that I heard [seemed like music and] was like the sound of harpists playing on their harps.

They will make war with the Lamb, but the Lamb will conquer them, because he is Lord of lords and King of kings, and those accompanying the Lamb are the called, chosen, and faithful."